{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988291348",
    "entityType": "Track",
    "nonce": "0x8a23133a8975dd07ee811c9b20372a0ddad4a8bdf6c35173a839e8343dede0c3",
    "signature": "0x97194cb7387711368826da24f97df07656e2fde63e657502d75616985f0f2cce7dcc0f4f1ca9ad2f119d17f12994c42c4d4855d48d99f68014fbecfe92a0e74f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}